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Autres articles (93)

  • L’utiliser, en parler, le critiquer

    10 avril 2011

    La première attitude à adopter est d’en parler, soit directement avec les personnes impliquées dans son développement, soit autour de vous pour convaincre de nouvelles personnes à l’utiliser.
    Plus la communauté sera nombreuse et plus les évolutions seront rapides ...
    Une liste de discussion est disponible pour tout échange entre utilisateurs.

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

Sur d’autres sites (10501)

  • ffmpeg reverse video resolution after compression

    30 août 2018, par Mehran

    I’m trying to compress a video to mp4 format with ffmpeg.

    With scale filter :

    cmd = "-i, "+in+" -vf scale=480:-2,setsar=1:1, "+out;

    Or as simple as this :

    cmd = "-i, "+in+" "+out;

    If I try this command, the outPut will be fine in many players like potPlayer(win) or mxPlayer(android), But in some players like kmPlayer.v3(win) it’s stretched. with or without scale filter.

    I tried the same video compression with Handbrake so I find out there is nothing wrong with my player.

    The result is the same with all videos that I compressed with ffmpeg library

    And there is another problem which is more annoying, the outPut video resolution gets reversed. for Example :

    Input : w1280 h720

    Output : w720 h1280

    I googled a lot but I found nothing.

  • How to Re-stream SDP as RTSP (at smaller resolution) using ffmpeg

    6 avril 2018, par mikeyb976

    I have an existing rtp stream (720p) via SDP which I would like to restream as RTSP as 360p resolution.

    I’ve been able to restream the sdp as rtsp successfully, using the command below :

    ffmpeg -protocol_whitelist file,udp,rtp -re -i mike1.sdp -c:v libx264 -s 640x360 -f rtsp -muxdelay 0.1 rtsp ://[username] :[password]@127.0.0.1:1935/live/myStream

    and my local wowser streaming server recognises the stream source as rtsp. I can also playback the video using a small c# project that implements vlc.dotnet.wpf player control. I just inject the rtsp url into it, and it loads.

    What I don’t know, is How can I create the rtsp stream so that it is at a lower resolution of 360p. (the source is 720p)

    Any help is much appreciated

  • using ffmpeg to record highest resolution offered by Facetime cameras (mac)

    15 juin 2018, par user1361529

    I am using the following code successfully to record a video feed from my mac

    ./ffmpeg -f avfoundation -framerate 30  -i "default" out.mp4

    This however seems to be recording video at the lowest resolution of 320x200

    My camera supports the following resolutions :

    [avfoundation @ 0x7ff7b2800000] Supported modes:
    
[avfoundation @ 0x7ff7b2800000]   1280x720@[1.000000 30.000000]fps
    
[avfoundation @ 0x7ff7b2800000]   640x480@[1.000000 30.000000]fps
    
[avfoundation @ 0x7ff7b2800000]   320x240@[1.000000 30.000000]fps

    I tried manually specifying the resolution using both -s and -video_size but that seems to just scale up the low res video.

    How do I get ffmpeg to pick my 1280x720 resolution ?

    thanks

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